Perfect budy for melee build.

[ Updated : Reinforce bond no longer give melee attack speed. :( and replace it with fetch. Redirection can be change for either Link mod or flat healt/shield mod, [Synth Fiber] or flat armor mod or [Restorative Bond] for more healing to the Kavat.
Another option is to add Venom Teeth and Frost Jaw to spread viral too with all clones. ]

Gives 60% attack speed, 40% crit chance, +1.2x crit dmg, melee combo, energy/health orb.

pair it with [Equilibrium] if you need more energy duplex will create tons of orbs.

It have good shield and if it falls you can raise it faster if you do headshot kills. It also has 60% chance to not die at all with [Tek Assault] if equipped.

Decent damage too when you use your heavy attack at X12.

The only mod that will not work with duplex mod is [Cat's Eye] and we don't care as they will all have it when the main kavat cast it !

You can swap [Bite] for [Hunter Synergy] if you have a primary with very good crit chance and other hunter mods elswhere.
You can swap [Tek Assault] for [Pack Leader] (prime or not), [Hastened Deflection] or [Fetch] if you need.